//整型數(shù)組 - 存放整型變量
int arr[10];
//字符數(shù)組 - 存放字符變量
char ch[5];
//指針數(shù)組 - 存放指針變量
int* arr[10];
//函數(shù)指針數(shù)組 - 存放函數(shù)指針
int(*pfar[10])(int, int);

int Add(int x, int y) {//int(*)(int,int)
	return x + y;
}
int Sub(int x, int y) {//int(*)(int,int)
	return x - y;
}
int Mul(int x, int y) {//int(*)(int,int)
	return x * y;
}
int Div(int x, int y) {//int(*)(int,int)
	return x / y;
}
int main() {
	//函數(shù)指針數(shù)組 - pfArr
	int(*pfArr[4])(int, int) = { Add,Sub,Mul,Div };
	return 0;
}

//計(jì)算器實(shí)現(xiàn)1.0
void menu() {
	printf("**********************************\n");
	printf("*****  1.Add  ******  2.Sub  *****\n");
	printf("*****  3.Mul  ******  4.Div  *****\n");
	printf("************  0.exit  ************\n");
	printf("**********************************\n");
}
int main() {
	int (*pfArr[10]) (int, int) = { 0,Add,Sub,Mul,Div };//數(shù)組下標(biāo)和選項(xiàng)序號(hào)匹配
	int input = 0;
	int a = 0;
	int b = 0;
	do {
		menu();
		printf("請(qǐng)選擇:>");
		scanf("%d", &input);
		if (0 <= input && input <= 4) {
			if (input == 0) {
				printf("退出游戲\n");
				break;
			}
			else {
				printf("請(qǐng)輸入操作數(shù)\n");
				scanf("%d %d", &a, &b);
				printf("ret == %d\n", pfArr[input](a, b));
				break;
			}
		}
		else {
			printf("輸入錯(cuò)誤\n");
			break;
		}
	} while (input);
	return 0;
}

/******
* 計(jì)算器實(shí)現(xiàn)
* 2.0
******/
void Calc(int (*pf)(int,int)) {
	int a = 0;
	int b = 0;
	printf("請(qǐng)輸入操作數(shù):>");
	scanf("%d %d", &a, &b);
	printf("%d\n", pf(a, b));
}
int main() {
	int input = 0;
	do {		menu();
		printf("請(qǐng)選擇:>");
		scanf("%d", &input);
		switch (input) {
		case 0:
			printf("退出成功\n");
			break;
		case 1:
			Calc(Add);
			break;
		case 2:
			Calc(Sub);
			break;
		case 3:
			Calc(Mul);
			break;
		case 4:
			Calc(Div);
			break;
		default:
			printf("請(qǐng)重新選擇\n");
			break;
		}
	} while (input);
	return 0;
}
/******
* 計(jì)算器實(shí)現(xiàn)
* 3.0
******/
int (*pfArr[10])(int, int) = { 0,Add,Sub,Mul,Div };
int input = 0;
void Call() {
	int a = 0;
  int b = 0;
	printf("請(qǐng)輸入操作數(shù):>");
	scanf("%d %d", &a, &b);
	printf("%d\n", pfArr[input](a, b));
}
int main() {
	do {
		menu();
		printf("請(qǐng)選擇:>");
		scanf("%d", &input);
		switch (input) {
		case 0:
			printf("退出成功\n");
			break;
		case 1:
		case 2:
		case 3:
		case 4:
			Call();
			break;
		default:
			printf("請(qǐng)重新選擇\n");
			break;
		}
	} while (input);
	return 0;
}

int arr[10];
int(*parr)[10] = &arr;//整型數(shù)組指針
char(*pch)[10] = &ch;//字符數(shù)組指針
//指向整型數(shù)組指針的指針
int(*(*pparr))[10] = &parr;
//指向字符數(shù)組指針的指針
char(*(*ppch))[10] = &pch;

//函數(shù)1.
int Add(int x, int y) {
	return x + y;
}
//函數(shù)指針2.
int (*pf)(int, int) = Add;
//函數(shù)指針數(shù)組3.
int (*pfArr[10])(int, int) = { Add };
//指向函數(shù)指針數(shù)組的指針4.
int(*(*ppfArr)[10])(int, int) = &pfArr;